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Patented Oct. 19,1897.

JNvzgvroL 0. MUNSON, Deod. F A. MUNSON, Executrix. GRINDING MILL.

(No Model.)

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THE NORRXS PETERS CO. PNOTO-LITNO. WASHINGTION, D. C.

NITED STATES PATENT EFIC CCUNTCIL MUNSON, OF UTIOA, NEW YORK; FLORENCE A. MUNSON, EXECU- TRIX OF SAID COUNTOIL MUNSON, DECEAsED, ASSIGNOR 'ro MUNSON BRos, F sAME PLACE.

GRINDING-MILL.

SPECIFICATION forming part Of Letters Patent 591,988, dated October 19, 1897. Application filed October 16, 1896. Serial No. 608,980- (No model.)

To ctZZ tuhom it may concern:

Be it known that I, OCUNTCIL MUNsoN, of

Utica, in the county of Oneida and State of New York, have invented certain new and art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to'the-figuresof reference marked thereon, which form part of this specification.

In the drawings, Figure 1 shows a longitudinal section of my grinding-mill with the grinding-disks close together. Fig. 2 shows the same with the grinding-disks separated. Fig. 3 shows a longitudinal section of a springcollar employed'in the construction. Fig. 4 shows one of the parts of the collar in perspective. Fig. 5 shows the other part in perspective.

Referring to the reference-figures in a more particular description of the device, 1 indicates the grinding-mill base, which carries four shaft-bearings 2, 3, 4, and 5. In the bearings 2 and 3 is mounted the shaft 6,carrying the grinding-disk 7. In the bearings 4 and 5 is mounted the shaft 8, carrying the 0 grinding-disk 9. The grinding-disks 7 and 9 are contained in the casing 10. The disk 7 is adapted to be driven in one direction by a belt on theband-pulley 11. The disk 9 is adapted to be driven in the opposite direcdisk 7 is not capable of automatic endwise movement. The disk 9 with its shaft 8 is adjustable toward the disk 7by means of the setting-up screw 13, engaging in a nut 17 on the end of the frame and acting against the end of the shaft 8. By operating this screw the disk 9 can be brought more or lessclosely to the disk 7 and thereby determine the fine- 5 ness with which the mill will grind. On the shaft 8 issecured the part 14 of the expansible collar 14. The other part, 14*, of this collar is loosely connected with the part 14 by pins 14, entering holes 14 The part 14 ;o is also provided with an overhanging edge 14 which assists in maintaining the part 14 in proper relation to the part 14. Between the parts 14 and 14 are introduced springs 15 15, which are compressed so as to force tion by a belt on the band-pulley 12.v As shown in the drawings,'the shaft 6 with its the part 14 outwardlyand away from the part 14 The springs 15 are received partially incavities or chambers in the part 14 separate and independent from holes 14, which receive the sliding pins, and partially in corresponding cavities or chambers in the part 14". The collar part 14 is secured on the shaft 8 so that the part 14 will press against the end ofthe shaft-bearing 4.

The grain is fed to the disks through a chute 16, which delivers the grain adjacent to the center of the disk, where it feeds through between the spokes of the disk at the center and is discharged after being ground between the peripheries of the disks. VJhen the disk 9 is set uptoward the disk 7, by operating the setting-up screw 13, it is done against the pressure of the springs 15- in the collar. Should the feed of grain run light or entirely fail, the tendency of the disk 9 to run against the disk 7, by reason "of the side throw of the belt or otherwise, is obviated by the holdingoff action of the collar 14, pressing against the outer end of the box 4. In case the disks should run in Contact without any grain being fed, they would injure one another.

The mill, as shown, is a double grindingmill, but it is evident that the disk 7 could beheld stationary instead of being driven in the opposite direction from the disk 9, in which case the mill would be a single mill, but the operation of the holding-off collar 14 would be the sam Y WhatI claim as new, and desire to secure by Letters Patent, is-- The combination in a grinding-mill of a rotary grinding-disk, an opposing plate or disk, a shaft carrying the rotary disk, bearingstherefor, a forcing-up screw mounted in afixed support and acting on the end of the shaft and a holding-off collar consisting of part 14 secured on the shaft and having pinholes14 and partial separate spring-chambeis and part 14 having pins 14 and partial spring chambers and springs within the spring-chambers, the part l4 acting against the end of the shaft-bearing, substantially as set forth. v

In witness whereof I have affixed my signature in presence of two witnesses.

COUNTOIL MUN SON.

Witnesses:

FRED GIBSON, A. E. CODE. 

